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Summary: Fields | Ctors | Methods | Inherited Methods

# InvalidClassException

`public class InvalidClassException`
`` `` `` `` `extends ObjectStreamException` ``

java.lang.Object
↳ | java.lang.Throwable
| ↳ | java.lang.Exception
|  | ↳ | java.io.IOException
|  |  | ↳ | java.io.ObjectStreamException
|  |  |  | ↳ | java.io.InvalidClassException

Thrown when the Serialization runtime detects one of the following problems with a Class.

- The serial version of the class does not match that of the class descriptor read from the stream
- The class contains unknown datatypes
- The class does not have an accessible no-arg constructor

## Summary

### Fields
`public String` | `classname` Name of the invalid class.

### Public constructors
`InvalidClassException(String reason)` Report an InvalidClassException for the reason specified.
`InvalidClassException(String cname, String reason)` Constructs an InvalidClassException object.

### Public methods
`String` | `getMessage()` Produce the message and include the classname, if present.

### Inherited methods
From class `java.lang.Throwable`
`final void` | `addSuppressed(Throwable exception)` Appends the specified exception to the exceptions that were suppressed in order to deliver this exception.
`Throwable` | `fillInStackTrace()` Fills in the execution stack trace.
`Throwable` | `getCause()` Returns the cause of this throwable or `null` if the cause is nonexistent or unknown.
`String` | `getLocalizedMessage()` Creates a localized description of this throwable.
`String` | `getMessage()` Returns the detail message string of this throwable.
`StackTraceElement[]` | `getStackTrace()` Provides programmatic access to the stack trace information printed by `printStackTrace()`.
`final Throwable[]` | `getSuppressed()` Returns an array containing all of the exceptions that were suppressed, typically by the `try`-with-resources statement, in order to deliver this exception.
`Throwable` | `initCause(Throwable cause)` Initializes the cause of this throwable to the specified value.
`void` | `printStackTrace()` Prints this throwable and its backtrace to the standard error stream.
`void` | `printStackTrace(PrintWriter s)` Prints this throwable and its backtrace to the specified print writer.
`void` | `printStackTrace(PrintStream s)` Prints this throwable and its backtrace to the specified print stream.
`void` | `setStackTrace(StackTraceElement[] stackTrace)` Sets the stack trace elements that will be returned by `getStackTrace()` and printed by `printStackTrace()` and related methods.
`String` | `toString()` Returns a short description of this throwable.
From class `java.lang.Object`
`Object` | `clone()` Creates and returns a copy of this object.
`boolean` | `equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void` | `finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>` | `getClass()` Returns the runtime class of this `Object`.
`int` | `hashCode()` Returns a hash code value for the object.
`final void` | `notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void` | `notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String` | `toString()` Returns a string representation of the object.
`final void` | `wait(long timeout, int nanos)` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object, or some other thread interrupts the current thread, or a certain amount of real time has elapsed.
`final void` | `wait(long timeout)` Causes the current thread to wait until either another thread invokes the `notify()` method or the `notifyAll()` method for this object, or a specified amount of time has elapsed.
`final void` | `wait()` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object.

## Fields

### classname

    public String classname

Name of the invalid class.

## Public constructors

### InvalidClassException

    public InvalidClassException (String reason)

Report an InvalidClassException for the reason specified.

Parameters
`reason` | `String`: String describing the reason for the exception.

### InvalidClassException

    public InvalidClassException (String cname,
                    String reason)

Constructs an InvalidClassException object.

Parameters
`cname` | `String`: a String naming the invalid class.
`reason` | `String`: a String describing the reason for the exception.

## Public methods

### getMessage

    public String getMessage ()

Produce the message and include the classname, if present.

Returns
`String` | the detail message string of this `Throwable` instance (which may be `null`).

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